This is Ultimate 0.2.4-dev-1d5fa63-m [2024-09-13 10:17:08,922 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-09-13 10:17:08,997 INFO L114 SettingsManager]: Loading settings from /storage/repos/certificate-witnesses-artifact/automizer/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-09-13 10:17:09,002 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-09-13 10:17:09,003 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-09-13 10:17:09,032 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-09-13 10:17:09,033 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-09-13 10:17:09,033 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-09-13 10:17:09,034 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-09-13 10:17:09,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-09-13 10:17:09,036 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-09-13 10:17:09,036 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-09-13 10:17:09,037 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-09-13 10:17:09,037 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-09-13 10:17:09,038 INFO L153 SettingsManager]: * Use SBE=true [2024-09-13 10:17:09,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-09-13 10:17:09,039 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-09-13 10:17:09,039 INFO L153 SettingsManager]: * sizeof long=4 [2024-09-13 10:17:09,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-09-13 10:17:09,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-09-13 10:17:09,040 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-09-13 10:17:09,041 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-09-13 10:17:09,042 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-09-13 10:17:09,042 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-09-13 10:17:09,042 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-09-13 10:17:09,042 INFO L153 SettingsManager]: * sizeof long double=12 [2024-09-13 10:17:09,043 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-09-13 10:17:09,043 INFO L153 SettingsManager]: * Use constant arrays=true [2024-09-13 10:17:09,043 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-09-13 10:17:09,044 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-09-13 10:17:09,044 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-09-13 10:17:09,045 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-09-13 10:17:09,045 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:17:09,045 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-09-13 10:17:09,045 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-09-13 10:17:09,045 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-09-13 10:17:09,046 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-09-13 10:17:09,046 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-09-13 10:17:09,046 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-09-13 10:17:09,047 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-09-13 10:17:09,047 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-09-13 10:17:09,047 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-09-13 10:17:09,047 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/certificate-witnesses-artifact/automizer/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Positions where we compute the Hoare Annotation -> None [2024-09-13 10:17:09,290 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-09-13 10:17:09,316 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-09-13 10:17:09,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-09-13 10:17:09,319 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-09-13 10:17:09,322 INFO L274 PluginConnector]: Witness Parser initialized [2024-09-13 10:17:09,324 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../results/automizer-verification-files/SV-COMP24_unreach-call/egcd2-ll_valuebound2.yml/witness-2.1.yml [2024-09-13 10:17:09,370 INFO L270 PluginConnector]: Initializing CDTParser... [2024-09-13 10:17:09,370 INFO L274 PluginConnector]: CDTParser initialized [2024-09-13 10:17:09,371 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/certificate-witnesses-artifact/automizer/../sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-13 10:17:10,814 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-09-13 10:17:11,003 INFO L384 CDTParser]: Found 1 translation units. [2024-09-13 10:17:11,004 INFO L180 CDTParser]: Scanning /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c [2024-09-13 10:17:11,011 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/certificate-witnesses-artifact/automizer/data/f57595db0/3af52452ab56425f9b91f1c4296ca785/FLAGb9b10beb0 [2024-09-13 10:17:11,025 INFO L435 CDTParser]: Successfully deleted /storage/repos/certificate-witnesses-artifact/automizer/data/f57595db0/3af52452ab56425f9b91f1c4296ca785 [2024-09-13 10:17:11,026 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-09-13 10:17:11,027 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-09-13 10:17:11,028 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-09-13 10:17:11,028 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-09-13 10:17:11,034 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-09-13 10:17:11,035 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:17:09" (1/2) ... [2024-09-13 10:17:11,038 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7f3e96 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:17:11, skipping insertion in model container [2024-09-13 10:17:11,038 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:17:09" (1/2) ... [2024-09-13 10:17:11,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@276b3ab4 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 13.09 10:17:11, skipping insertion in model container [2024-09-13 10:17:11,040 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:17:11" (2/2) ... [2024-09-13 10:17:11,040 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d7f3e96 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11, skipping insertion in model container [2024-09-13 10:17:11,040 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.09 10:17:11" (2/2) ... [2024-09-13 10:17:11,052 INFO L93 nessWitnessExtractor]: Found the following entries in the witness: [2024-09-13 10:17:11,053 INFO L1541 ArrayList]: Loop invariant at [L41-L68] (((((((((((((b == 1) && (s == 0)) && (p == 0)) && (y == xy)) && (r == 1)) && (a == y)) && (x == 1)) && (yy == ((long long) y * y))) && (a == 2)) && (q == 1)) || (((((((((1 <= x) && (y <= 2)) && (b == 0)) && (p == 0)) && (r == 1)) && (a == y)) && (1 <= y)) && ((((__int128) q * x) + ((__int128) y * s)) == 0)) && (x <= 2))) || ((((((((((((r == 0) && (y <= 2)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1))) || (((((((((((long long) x + 1) <= y) && (r == 0)) && ((((long long) x * 2) + b) == y)) && (y <= 2)) && (s == 1)) && (((__int128) q + 2) == 0)) && (((__int128) b + 1) <= x)) && (a == x)) && (p == 1))) [2024-09-13 10:17:11,053 INFO L1541 ArrayList]: Loop invariant at [L47-L56] ((((((((((((((((((r == 0) && (s == 1)) && (a == (c + b))) && (0 <= c)) && (b == y)) && (k == 1)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (x <= 2)) && (p == 1)) || ((((((((((((((r == 0) && (a == (c + ((__int128) b * k)))) && (s == 1)) && (1 <= a)) && (0 <= c)) && (yy == ((long long) y * y))) && ((c + ((__int128) b * 2)) <= 2)) && (q == 0)) && (1 <= b)) && (xy == ((long long) y * x))) && (a == x)) && (x == (c + ((__int128) k * y)))) && (x <= 2)) && (p == 1))) || ((((((((((((((r == 0) && (y <= 2)) && (k == 0)) && (s == 1)) && (1 <= a)) && (b == y)) && (yy == ((long long) y * y))) && (q == 0)) && (1 <= y)) && (xy == ((long long) y * x))) && (a == x)) && (c == x)) && (x <= 2)) && (p == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (k == 0)) && (2 == xy)) && (r == 1)) && (c == 2)) && (x == 1)) && (yy == 4)) && (a == 2)) && (q == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 1)) && (a == 2)) && (q == 1)) && (c == 1))) || ((((((((((((y == 2) && (b == 1)) && (s == 0)) && (p == 0)) && (2 == xy)) && (r == 1)) && (x == 1)) && (yy == 4)) && (k == 2)) && (a == 2)) && (c == 0)) && (q == 1))) [2024-09-13 10:17:11,053 INFO L1541 ArrayList]: Function contract at [L7]: requires null, ensures (\old(cond) != 0) [2024-09-13 10:17:11,053 INFO L1541 ArrayList]: Function contract at [L10]: requires (1 <= \old(cond)), ensures (1 <= \old(cond)) [2024-09-13 10:17:11,089 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-09-13 10:17:11,254 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] [2024-09-13 10:17:11,288 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:17:11,298 INFO L200 MainTranslator]: Completed pre-run Start Parsing Global Start Parsing Global Start Parsing Global [2024-09-13 10:17:11,329 WARN L247 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/certificate-witnesses-artifact/sv-benchmarks/c/nla-digbench-scaling/egcd2-ll_valuebound2.c[490,503] Start Parsing Local Start Parsing Local [2024-09-13 10:17:11,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-09-13 10:17:11,384 INFO L204 MainTranslator]: Completed translation [2024-09-13 10:17:11,384 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11 WrapperNode [2024-09-13 10:17:11,385 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-09-13 10:17:11,385 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-09-13 10:17:11,386 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-09-13 10:17:11,386 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-09-13 10:17:11,392 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,400 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,431 INFO L138 Inliner]: procedures = 14, calls = 19, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 79 [2024-09-13 10:17:11,435 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-09-13 10:17:11,436 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-09-13 10:17:11,436 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-09-13 10:17:11,436 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-09-13 10:17:11,448 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,448 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,452 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,460 WARN L109 MemorySlicer]: Omit memory slicing because it failed with the following exception: Unsupported: Procedure assume_abort_if_not is not part of the Ultimate memory model but has specification other that is not a ModifiesSpecification [2024-09-13 10:17:11,464 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,464 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,472 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,475 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,480 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,481 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-09-13 10:17:11,487 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-09-13 10:17:11,490 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-09-13 10:17:11,490 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-09-13 10:17:11,491 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (1/1) ... [2024-09-13 10:17:11,496 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-09-13 10:17:11,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:11,522 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-09-13 10:17:11,530 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-09-13 10:17:11,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-09-13 10:17:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-09-13 10:17:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-09-13 10:17:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-09-13 10:17:11,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-09-13 10:17:11,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-09-13 10:17:11,571 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2024-09-13 10:17:11,571 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2024-09-13 10:17:11,637 INFO L242 CfgBuilder]: Building ICFG [2024-09-13 10:17:11,639 INFO L268 CfgBuilder]: Building CFG for each procedure with an implementation [2024-09-13 10:17:11,974 WARN L783 $ProcedureCfgBuilder]: Label in the middle of a codeblock. [2024-09-13 10:17:12,016 INFO L? ?]: Removed 69 outVars from TransFormulas that were not future-live. [2024-09-13 10:17:12,016 INFO L291 CfgBuilder]: Performing block encoding [2024-09-13 10:17:12,038 INFO L313 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-09-13 10:17:12,039 INFO L318 CfgBuilder]: Removed 2 assume(true) statements. [2024-09-13 10:17:12,039 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:17:12 BoogieIcfgContainer [2024-09-13 10:17:12,040 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-09-13 10:17:12,042 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-09-13 10:17:12,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-09-13 10:17:12,046 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-09-13 10:17:12,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness-2.1.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 13.09 10:17:09" (1/4) ... [2024-09-13 10:17:12,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49af3003 and model type witness-2.1.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 13.09 10:17:12, skipping insertion in model container [2024-09-13 10:17:12,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.09 10:17:11" (2/4) ... [2024-09-13 10:17:12,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49af3003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:17:12, skipping insertion in model container [2024-09-13 10:17:12,049 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.09 10:17:11" (3/4) ... [2024-09-13 10:17:12,049 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@49af3003 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.09 10:17:12, skipping insertion in model container [2024-09-13 10:17:12,050 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.09 10:17:12" (4/4) ... [2024-09-13 10:17:12,051 INFO L112 eAbstractionObserver]: Analyzing ICFG egcd2-ll_valuebound2.c [2024-09-13 10:17:12,066 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-09-13 10:17:12,066 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2024-09-13 10:17:12,117 INFO L335 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-09-13 10:17:12,126 INFO L336 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67e2539, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-09-13 10:17:12,126 INFO L337 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2024-09-13 10:17:12,130 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 30 states have internal predecessors, (37), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) [2024-09-13 10:17:12,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:17:12,139 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:12,139 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:17:12,140 INFO L399 AbstractCegarLoop]: === Iteration 1 === Targeting assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:12,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:12,147 INFO L85 PathProgramCache]: Analyzing trace with hash 135674271, now seen corresponding path program 1 times [2024-09-13 10:17:12,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:12,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2036298723] [2024-09-13 10:17:12,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:12,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:12,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:17:12,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:12,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2036298723] [2024-09-13 10:17:12,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2036298723] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:12,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:12,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:17:12,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673680860] [2024-09-13 10:17:12,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:12,298 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-09-13 10:17:12,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:12,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-09-13 10:17:12,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 10:17:12,331 INFO L87 Difference]: Start difference. First operand has 44 states, 24 states have (on average 1.5416666666666667) internal successors, (37), 30 states have internal predecessors, (37), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (12), 12 states have call predecessors, (12), 12 states have call successors, (12) Second operand has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:17:12,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:12,358 INFO L93 Difference]: Finished difference Result 44 states and 55 transitions. [2024-09-13 10:17:12,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-09-13 10:17:12,362 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 10:17:12,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:12,368 INFO L225 Difference]: With dead ends: 44 [2024-09-13 10:17:12,368 INFO L226 Difference]: Without dead ends: 42 [2024-09-13 10:17:12,370 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-09-13 10:17:12,374 INFO L434 NwaCegarLoop]: 52 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 3 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:12,375 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 52 Invalid, 3 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:17:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2024-09-13 10:17:12,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2024-09-13 10:17:12,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 1.3043478260869565) internal successors, (30), 29 states have internal predecessors, (30), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 10:17:12,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 53 transitions. [2024-09-13 10:17:12,417 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 53 transitions. Word has length 5 [2024-09-13 10:17:12,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:12,418 INFO L474 AbstractCegarLoop]: Abstraction has 42 states and 53 transitions. [2024-09-13 10:17:12,418 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.0) internal successors, (4), 2 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:17:12,419 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 53 transitions. [2024-09-13 10:17:12,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-09-13 10:17:12,420 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:12,420 INFO L216 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-09-13 10:17:12,421 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-09-13 10:17:12,421 INFO L399 AbstractCegarLoop]: === Iteration 2 === Targeting assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:12,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:12,422 INFO L85 PathProgramCache]: Analyzing trace with hash 135674333, now seen corresponding path program 1 times [2024-09-13 10:17:12,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:12,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545428510] [2024-09-13 10:17:12,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:12,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:12,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-09-13 10:17:12,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:12,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545428510] [2024-09-13 10:17:12,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545428510] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:12,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:12,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:17:12,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281262269] [2024-09-13 10:17:12,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:12,534 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:17:12,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:12,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:17:12,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:17:12,535 INFO L87 Difference]: Start difference. First operand 42 states and 53 transitions. Second operand has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:17:12,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:12,594 INFO L93 Difference]: Finished difference Result 41 states and 52 transitions. [2024-09-13 10:17:12,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:17:12,595 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-09-13 10:17:12,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:12,597 INFO L225 Difference]: With dead ends: 41 [2024-09-13 10:17:12,598 INFO L226 Difference]: Without dead ends: 41 [2024-09-13 10:17:12,598 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:17:12,599 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 1 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:12,600 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 112 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:17:12,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2024-09-13 10:17:12,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2024-09-13 10:17:12,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 28 states have internal predecessors, (29), 12 states have call successors, (12), 2 states have call predecessors, (12), 2 states have return successors, (11), 11 states have call predecessors, (11), 11 states have call successors, (11) [2024-09-13 10:17:12,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 52 transitions. [2024-09-13 10:17:12,611 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 52 transitions. Word has length 5 [2024-09-13 10:17:12,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:12,611 INFO L474 AbstractCegarLoop]: Abstraction has 41 states and 52 transitions. [2024-09-13 10:17:12,611 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 4 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:17:12,611 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 52 transitions. [2024-09-13 10:17:12,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-09-13 10:17:12,613 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:12,613 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:12,613 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-09-13 10:17:12,613 INFO L399 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:12,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:12,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1738672974, now seen corresponding path program 1 times [2024-09-13 10:17:12,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:12,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3074949] [2024-09-13 10:17:12,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:12,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,246 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:13,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,296 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,311 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:13,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,325 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:13,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,341 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:13,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,358 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 10:17:13,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:13,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3074949] [2024-09-13 10:17:13,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3074949] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:13,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379946600] [2024-09-13 10:17:13,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:13,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:13,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:13,361 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:13,363 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-09-13 10:17:13,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:13,482 INFO L262 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-09-13 10:17:13,489 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:13,820 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 10:17:13,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 2 proven. 22 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2024-09-13 10:17:14,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379946600] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:14,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:17:14,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2024-09-13 10:17:14,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632472756] [2024-09-13 10:17:14,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:14,232 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-09-13 10:17:14,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:14,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-09-13 10:17:14,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2024-09-13 10:17:14,234 INFO L87 Difference]: Start difference. First operand 41 states and 52 transitions. Second operand has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:17:14,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:14,513 INFO L93 Difference]: Finished difference Result 54 states and 72 transitions. [2024-09-13 10:17:14,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 10:17:14,513 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) Word has length 34 [2024-09-13 10:17:14,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:14,515 INFO L225 Difference]: With dead ends: 54 [2024-09-13 10:17:14,516 INFO L226 Difference]: Without dead ends: 54 [2024-09-13 10:17:14,516 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=71, Invalid=169, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:17:14,517 INFO L434 NwaCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 174 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:14,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 143 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 174 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:17:14,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-09-13 10:17:14,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 51. [2024-09-13 10:17:14,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 33 states have internal predecessors, (38), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (15), 15 states have call predecessors, (15), 15 states have call successors, (15) [2024-09-13 10:17:14,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-13 10:17:14,532 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 34 [2024-09-13 10:17:14,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:14,534 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-13 10:17:14,534 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 10 states have call successors, (11), 1 states have call predecessors, (11), 2 states have return successors, (13), 10 states have call predecessors, (13), 10 states have call successors, (13) [2024-09-13 10:17:14,534 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-13 10:17:14,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-09-13 10:17:14,535 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:14,535 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:14,553 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-09-13 10:17:14,739 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:14,740 INFO L399 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:14,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:14,740 INFO L85 PathProgramCache]: Analyzing trace with hash -498970520, now seen corresponding path program 1 times [2024-09-13 10:17:14,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:14,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767303604] [2024-09-13 10:17:14,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:14,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:14,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,181 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:15,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,185 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:15,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,189 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:15,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,192 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:15,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,195 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:15,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,206 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:15,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,217 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 10:17:15,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:15,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767303604] [2024-09-13 10:17:15,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767303604] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:15,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:15,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-09-13 10:17:15,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048195641] [2024-09-13 10:17:15,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:15,219 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-09-13 10:17:15,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:15,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-09-13 10:17:15,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:17:15,220 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:17:15,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:15,401 INFO L93 Difference]: Finished difference Result 60 states and 83 transitions. [2024-09-13 10:17:15,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-09-13 10:17:15,402 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) Word has length 37 [2024-09-13 10:17:15,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:15,403 INFO L225 Difference]: With dead ends: 60 [2024-09-13 10:17:15,403 INFO L226 Difference]: Without dead ends: 60 [2024-09-13 10:17:15,403 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-09-13 10:17:15,404 INFO L434 NwaCegarLoop]: 42 mSDtfsCounter, 21 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 57 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 106 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 57 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:15,404 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 106 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 57 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:17:15,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2024-09-13 10:17:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 54. [2024-09-13 10:17:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 32 states have (on average 1.25) internal successors, (40), 36 states have internal predecessors, (40), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 10:17:15,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 73 transitions. [2024-09-13 10:17:15,416 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 73 transitions. Word has length 37 [2024-09-13 10:17:15,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:15,417 INFO L474 AbstractCegarLoop]: Abstraction has 54 states and 73 transitions. [2024-09-13 10:17:15,417 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.5) internal successors, (10), 5 states have internal predecessors, (10), 2 states have call successors, (6), 1 states have call predecessors, (6), 1 states have return successors, (6), 2 states have call predecessors, (6), 2 states have call successors, (6) [2024-09-13 10:17:15,417 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 73 transitions. [2024-09-13 10:17:15,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 10:17:15,419 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:15,419 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:15,419 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-09-13 10:17:15,419 INFO L399 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr1ENSURES_VIOLATIONPOST_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:15,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:15,420 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432174, now seen corresponding path program 1 times [2024-09-13 10:17:15,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465371106] [2024-09-13 10:17:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:15,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:15,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,456 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:15,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,458 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:15,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,461 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,462 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:15,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,464 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:15,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,466 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:15,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,468 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 10:17:15,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:15,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465371106] [2024-09-13 10:17:15,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465371106] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:15,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:15,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-09-13 10:17:15,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477163303] [2024-09-13 10:17:15,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:15,470 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:17:15,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:15,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:17:15,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:17:15,471 INFO L87 Difference]: Start difference. First operand 54 states and 73 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-13 10:17:15,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:15,497 INFO L93 Difference]: Finished difference Result 53 states and 72 transitions. [2024-09-13 10:17:15,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:17:15,497 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-09-13 10:17:15,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:15,499 INFO L225 Difference]: With dead ends: 53 [2024-09-13 10:17:15,500 INFO L226 Difference]: Without dead ends: 53 [2024-09-13 10:17:15,500 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:17:15,501 INFO L434 NwaCegarLoop]: 43 mSDtfsCounter, 3 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:15,501 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 77 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:17:15,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2024-09-13 10:17:15,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2024-09-13 10:17:15,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 32 states have (on average 1.21875) internal successors, (39), 35 states have internal predecessors, (39), 17 states have call successors, (17), 2 states have call predecessors, (17), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 10:17:15,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 72 transitions. [2024-09-13 10:17:15,507 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 72 transitions. Word has length 42 [2024-09-13 10:17:15,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:15,507 INFO L474 AbstractCegarLoop]: Abstraction has 53 states and 72 transitions. [2024-09-13 10:17:15,508 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-13 10:17:15,508 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 72 transitions. [2024-09-13 10:17:15,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-09-13 10:17:15,509 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:15,509 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:15,509 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-09-13 10:17:15,509 INFO L399 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:15,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1880432013, now seen corresponding path program 1 times [2024-09-13 10:17:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143357012] [2024-09-13 10:17:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:15,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,557 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:15,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,561 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:15,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,564 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:15,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:15,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:15,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:15,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:15,574 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 60 trivial. 0 not checked. [2024-09-13 10:17:15,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:15,576 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143357012] [2024-09-13 10:17:15,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143357012] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:15,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:15,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:17:15,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983751439] [2024-09-13 10:17:15,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:15,577 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-09-13 10:17:15,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:15,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-09-13 10:17:15,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:17:15,579 INFO L87 Difference]: Start difference. First operand 53 states and 72 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-13 10:17:15,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:15,589 INFO L93 Difference]: Finished difference Result 51 states and 70 transitions. [2024-09-13 10:17:15,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-09-13 10:17:15,590 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 42 [2024-09-13 10:17:15,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:15,590 INFO L225 Difference]: With dead ends: 51 [2024-09-13 10:17:15,590 INFO L226 Difference]: Without dead ends: 51 [2024-09-13 10:17:15,591 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-09-13 10:17:15,591 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 0 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:15,592 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 92 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:17:15,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2024-09-13 10:17:15,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2024-09-13 10:17:15,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 33 states have internal predecessors, (37), 16 states have call successors, (16), 2 states have call predecessors, (16), 2 states have return successors, (16), 15 states have call predecessors, (16), 16 states have call successors, (16) [2024-09-13 10:17:15,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 69 transitions. [2024-09-13 10:17:15,603 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 69 transitions. Word has length 42 [2024-09-13 10:17:15,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:15,603 INFO L474 AbstractCegarLoop]: Abstraction has 51 states and 69 transitions. [2024-09-13 10:17:15,603 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 1 states have call successors, (7), 1 states have call predecessors, (7), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2024-09-13 10:17:15,603 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 69 transitions. [2024-09-13 10:17:15,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-09-13 10:17:15,607 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:15,607 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:15,607 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-09-13 10:17:15,607 INFO L399 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:15,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:15,608 INFO L85 PathProgramCache]: Analyzing trace with hash 837542670, now seen corresponding path program 1 times [2024-09-13 10:17:15,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:15,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402529976] [2024-09-13 10:17:15,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:15,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:15,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,198 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:16,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,201 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:16,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,203 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,205 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:16,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,207 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:16,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,216 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,226 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 10:17:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,243 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 10:17:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,263 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:17:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,277 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 10:17:16,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,295 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:16,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:16,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402529976] [2024-09-13 10:17:16,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1402529976] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1296035135] [2024-09-13 10:17:16,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:16,298 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:16,298 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:16,300 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:16,304 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-09-13 10:17:16,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:16,367 INFO L262 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:17:16,371 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:17,019 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:17,838 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:17,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1296035135] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:17,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:17:17,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-09-13 10:17:17,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179066075] [2024-09-13 10:17:17,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:17,840 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-09-13 10:17:17,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:17,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-09-13 10:17:17,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=66, Unknown=0, NotChecked=0, Total=110 [2024-09-13 10:17:17,842 INFO L87 Difference]: Start difference. First operand 51 states and 69 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 10:17:18,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:18,262 INFO L93 Difference]: Finished difference Result 84 states and 125 transitions. [2024-09-13 10:17:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-09-13 10:17:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) Word has length 60 [2024-09-13 10:17:18,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:18,265 INFO L225 Difference]: With dead ends: 84 [2024-09-13 10:17:18,265 INFO L226 Difference]: Without dead ends: 84 [2024-09-13 10:17:18,265 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=72, Invalid=110, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:17:18,266 INFO L434 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 160 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:18,266 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 171 Invalid, 191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 160 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:17:18,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-13 10:17:18,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 62. [2024-09-13 10:17:18,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 38 states have (on average 1.236842105263158) internal successors, (47), 40 states have internal predecessors, (47), 20 states have call successors, (20), 2 states have call predecessors, (20), 2 states have return successors, (20), 19 states have call predecessors, (20), 20 states have call successors, (20) [2024-09-13 10:17:18,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 87 transitions. [2024-09-13 10:17:18,273 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 87 transitions. Word has length 60 [2024-09-13 10:17:18,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:18,274 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 87 transitions. [2024-09-13 10:17:18,274 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 11 states have internal predecessors, (29), 6 states have call successors, (20), 1 states have call predecessors, (20), 1 states have return successors, (20), 6 states have call predecessors, (20), 6 states have call successors, (20) [2024-09-13 10:17:18,274 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 87 transitions. [2024-09-13 10:17:18,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2024-09-13 10:17:18,275 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:18,275 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:18,297 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-09-13 10:17:18,476 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-09-13 10:17:18,476 INFO L399 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:18,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:18,477 INFO L85 PathProgramCache]: Analyzing trace with hash 194017890, now seen corresponding path program 1 times [2024-09-13 10:17:18,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:18,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1876232213] [2024-09-13 10:17:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:18,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:18,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:18,512 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [403765270] [2024-09-13 10:17:18,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:18,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:18,512 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:18,514 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:18,516 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-09-13 10:17:18,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:18,588 INFO L262 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-09-13 10:17:18,591 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:19,247 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:19,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:19,893 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:19,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:19,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1876232213] [2024-09-13 10:17:19,895 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:19,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403765270] [2024-09-13 10:17:19,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403765270] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:19,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:17:19,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2024-09-13 10:17:19,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154818055] [2024-09-13 10:17:19,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:19,896 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-09-13 10:17:19,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:19,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-09-13 10:17:19,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-09-13 10:17:19,897 INFO L87 Difference]: Start difference. First operand 62 states and 87 transitions. Second operand has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 10:17:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:20,218 INFO L93 Difference]: Finished difference Result 95 states and 150 transitions. [2024-09-13 10:17:20,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-09-13 10:17:20,219 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 61 [2024-09-13 10:17:20,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:20,220 INFO L225 Difference]: With dead ends: 95 [2024-09-13 10:17:20,220 INFO L226 Difference]: Without dead ends: 95 [2024-09-13 10:17:20,220 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 111 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:17:20,221 INFO L434 NwaCegarLoop]: 45 mSDtfsCounter, 19 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:20,221 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 136 Invalid, 123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:17:20,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2024-09-13 10:17:20,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2024-09-13 10:17:20,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 61 states have (on average 1.2622950819672132) internal successors, (77), 56 states have internal predecessors, (77), 36 states have call successors, (36), 2 states have call predecessors, (36), 2 states have return successors, (36), 35 states have call predecessors, (36), 36 states have call successors, (36) [2024-09-13 10:17:20,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 149 transitions. [2024-09-13 10:17:20,230 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 149 transitions. Word has length 61 [2024-09-13 10:17:20,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:20,230 INFO L474 AbstractCegarLoop]: Abstraction has 94 states and 149 transitions. [2024-09-13 10:17:20,230 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.4) internal successors, (17), 6 states have internal predecessors, (17), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 10:17:20,231 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 149 transitions. [2024-09-13 10:17:20,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2024-09-13 10:17:20,231 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:20,232 INFO L216 NwaCegarLoop]: trace histogram [6, 6, 6, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:20,249 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:20,435 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-09-13 10:17:20,436 INFO L399 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:20,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:20,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1038968620, now seen corresponding path program 1 times [2024-09-13 10:17:20,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:20,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146064797] [2024-09-13 10:17:20,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:20,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:20,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:20,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [589970021] [2024-09-13 10:17:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:20,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:20,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:20,464 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:20,465 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-09-13 10:17:20,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:20,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:17:20,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:21,121 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:21,122 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:21,695 INFO L134 CoverageAnalysis]: Checked inductivity of 88 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2024-09-13 10:17:21,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146064797] [2024-09-13 10:17:21,695 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:21,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589970021] [2024-09-13 10:17:21,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589970021] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:21,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:17:21,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8] total 13 [2024-09-13 10:17:21,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853059387] [2024-09-13 10:17:21,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:21,696 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-09-13 10:17:21,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:21,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-09-13 10:17:21,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:17:21,697 INFO L87 Difference]: Start difference. First operand 94 states and 149 transitions. Second operand has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 10:17:22,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:22,220 INFO L93 Difference]: Finished difference Result 128 states and 213 transitions. [2024-09-13 10:17:22,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-09-13 10:17:22,220 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) Word has length 64 [2024-09-13 10:17:22,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:22,221 INFO L225 Difference]: With dead ends: 128 [2024-09-13 10:17:22,221 INFO L226 Difference]: Without dead ends: 128 [2024-09-13 10:17:22,222 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2024-09-13 10:17:22,222 INFO L434 NwaCegarLoop]: 44 mSDtfsCounter, 23 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 204 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 230 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:22,222 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 183 Invalid, 230 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 204 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:17:22,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2024-09-13 10:17:22,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 119. [2024-09-13 10:17:22,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 78 states have (on average 1.2692307692307692) internal successors, (99), 69 states have internal predecessors, (99), 48 states have call successors, (48), 2 states have call predecessors, (48), 2 states have return successors, (48), 47 states have call predecessors, (48), 48 states have call successors, (48) [2024-09-13 10:17:22,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 195 transitions. [2024-09-13 10:17:22,241 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 195 transitions. Word has length 64 [2024-09-13 10:17:22,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:22,242 INFO L474 AbstractCegarLoop]: Abstraction has 119 states and 195 transitions. [2024-09-13 10:17:22,242 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.857142857142857) internal successors, (20), 8 states have internal predecessors, (20), 2 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 2 states have call predecessors, (10), 2 states have call successors, (10) [2024-09-13 10:17:22,242 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 195 transitions. [2024-09-13 10:17:22,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2024-09-13 10:17:22,243 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:22,244 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:22,256 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:22,445 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:22,445 INFO L399 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:22,446 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:22,446 INFO L85 PathProgramCache]: Analyzing trace with hash -1600080472, now seen corresponding path program 2 times [2024-09-13 10:17:22,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:22,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [41200473] [2024-09-13 10:17:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:22,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:22,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1832583385] [2024-09-13 10:17:22,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:17:22,471 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:22,471 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:22,472 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:22,474 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-09-13 10:17:22,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:17:22,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:17:22,541 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 28 conjuncts are in the unsatisfiable core [2024-09-13 10:17:22,544 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:23,278 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:23,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 181 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:24,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [41200473] [2024-09-13 10:17:24,441 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:24,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832583385] [2024-09-13 10:17:24,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1832583385] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:24,441 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:17:24,441 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2024-09-13 10:17:24,441 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461280002] [2024-09-13 10:17:24,441 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:24,442 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-09-13 10:17:24,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:24,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-09-13 10:17:24,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=82, Unknown=0, NotChecked=0, Total=132 [2024-09-13 10:17:24,442 INFO L87 Difference]: Start difference. First operand 119 states and 195 transitions. Second operand has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-13 10:17:24,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:24,867 INFO L93 Difference]: Finished difference Result 193 states and 319 transitions. [2024-09-13 10:17:24,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 10:17:24,868 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) Word has length 83 [2024-09-13 10:17:24,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:24,869 INFO L225 Difference]: With dead ends: 193 [2024-09-13 10:17:24,869 INFO L226 Difference]: Without dead ends: 193 [2024-09-13 10:17:24,870 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=96, Invalid=144, Unknown=0, NotChecked=0, Total=240 [2024-09-13 10:17:24,870 INFO L434 NwaCegarLoop]: 56 mSDtfsCounter, 21 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 200 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 201 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:24,870 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 201 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 200 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:17:24,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2024-09-13 10:17:24,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 173. [2024-09-13 10:17:24,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 108 states have (on average 1.3148148148148149) internal successors, (142), 95 states have internal predecessors, (142), 75 states have call successors, (75), 2 states have call predecessors, (75), 2 states have return successors, (75), 75 states have call predecessors, (75), 75 states have call successors, (75) [2024-09-13 10:17:24,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 292 transitions. [2024-09-13 10:17:24,884 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 292 transitions. Word has length 83 [2024-09-13 10:17:24,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:24,885 INFO L474 AbstractCegarLoop]: Abstraction has 173 states and 292 transitions. [2024-09-13 10:17:24,885 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.727272727272727) internal successors, (30), 12 states have internal predecessors, (30), 7 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 7 states have call predecessors, (24), 7 states have call successors, (24) [2024-09-13 10:17:24,885 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 292 transitions. [2024-09-13 10:17:24,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2024-09-13 10:17:24,886 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:24,886 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:24,902 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:25,090 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-09-13 10:17:25,091 INFO L399 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:25,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:25,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1937111816, now seen corresponding path program 1 times [2024-09-13 10:17:25,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:25,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253702042] [2024-09-13 10:17:25,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:25,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:25,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:25,125 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1706480037] [2024-09-13 10:17:25,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:25,125 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:25,125 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:25,131 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:25,134 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-09-13 10:17:25,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:25,206 INFO L262 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-09-13 10:17:25,209 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:25,671 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:25,672 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:26,539 INFO L134 CoverageAnalysis]: Checked inductivity of 180 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:26,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253702042] [2024-09-13 10:17:26,539 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:26,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706480037] [2024-09-13 10:17:26,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706480037] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:26,539 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:17:26,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2024-09-13 10:17:26,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [216037912] [2024-09-13 10:17:26,539 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:26,540 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-09-13 10:17:26,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:26,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-09-13 10:17:26,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-09-13 10:17:26,541 INFO L87 Difference]: Start difference. First operand 173 states and 292 transitions. Second operand has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-13 10:17:27,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:27,388 INFO L93 Difference]: Finished difference Result 118 states and 180 transitions. [2024-09-13 10:17:27,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-09-13 10:17:27,388 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) Word has length 84 [2024-09-13 10:17:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:27,389 INFO L225 Difference]: With dead ends: 118 [2024-09-13 10:17:27,389 INFO L226 Difference]: Without dead ends: 118 [2024-09-13 10:17:27,390 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=101, Invalid=279, Unknown=0, NotChecked=0, Total=380 [2024-09-13 10:17:27,390 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 34 mSDsluCounter, 229 mSDsCounter, 0 mSdLazyCounter, 290 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 318 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 290 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:27,390 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 282 Invalid, 318 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 290 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2024-09-13 10:17:27,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2024-09-13 10:17:27,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 105. [2024-09-13 10:17:27,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 67 states have (on average 1.208955223880597) internal successors, (81), 59 states have internal predecessors, (81), 43 states have call successors, (43), 2 states have call predecessors, (43), 2 states have return successors, (43), 43 states have call predecessors, (43), 43 states have call successors, (43) [2024-09-13 10:17:27,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 167 transitions. [2024-09-13 10:17:27,397 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 167 transitions. Word has length 84 [2024-09-13 10:17:27,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:27,397 INFO L474 AbstractCegarLoop]: Abstraction has 105 states and 167 transitions. [2024-09-13 10:17:27,397 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 13 states have internal predecessors, (32), 6 states have call successors, (24), 1 states have call predecessors, (24), 1 states have return successors, (24), 6 states have call predecessors, (24), 6 states have call successors, (24) [2024-09-13 10:17:27,397 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 167 transitions. [2024-09-13 10:17:27,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 10:17:27,398 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:27,399 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:27,417 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-09-13 10:17:27,602 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-09-13 10:17:27,603 INFO L399 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:27,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:27,604 INFO L85 PathProgramCache]: Analyzing trace with hash 1223876898, now seen corresponding path program 1 times [2024-09-13 10:17:27,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:27,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411879962] [2024-09-13 10:17:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:27,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:27,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,522 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:28,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,524 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:28,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,526 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:28,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,527 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,528 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:28,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,532 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:28,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,536 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 10:17:28,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,543 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 10:17:28,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,549 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:17:28,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,556 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 10:17:28,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,562 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 10:17:28,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,571 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 10:17:28,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 10:17:28,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 10:17:28,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:28,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411879962] [2024-09-13 10:17:28,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411879962] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:28,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248666391] [2024-09-13 10:17:28,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:28,613 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:28,613 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:28,615 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:28,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-09-13 10:17:28,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:28,690 INFO L262 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 30 conjuncts are in the unsatisfiable core [2024-09-13 10:17:28,693 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:29,407 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:29,408 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 8 proven. 4 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:30,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248666391] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:30,454 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:17:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 9] total 22 [2024-09-13 10:17:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61223665] [2024-09-13 10:17:30,454 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:30,454 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 10:17:30,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:30,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 10:17:30,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=383, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:17:30,455 INFO L87 Difference]: Start difference. First operand 105 states and 167 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-13 10:17:31,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:31,114 INFO L93 Difference]: Finished difference Result 116 states and 178 transitions. [2024-09-13 10:17:31,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 10:17:31,114 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) Word has length 87 [2024-09-13 10:17:31,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:31,115 INFO L225 Difference]: With dead ends: 116 [2024-09-13 10:17:31,115 INFO L226 Difference]: Without dead ends: 116 [2024-09-13 10:17:31,116 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 217 GetRequests, 189 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=666, Unknown=0, NotChecked=0, Total=870 [2024-09-13 10:17:31,116 INFO L434 NwaCegarLoop]: 53 mSDtfsCounter, 43 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 320 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 326 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:31,116 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [55 Valid, 326 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 320 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-09-13 10:17:31,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2024-09-13 10:17:31,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 82. [2024-09-13 10:17:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 46 states have (on average 1.1521739130434783) internal successors, (53), 48 states have internal predecessors, (53), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-13 10:17:31,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 115 transitions. [2024-09-13 10:17:31,122 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 115 transitions. Word has length 87 [2024-09-13 10:17:31,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:31,122 INFO L474 AbstractCegarLoop]: Abstraction has 82 states and 115 transitions. [2024-09-13 10:17:31,123 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 23 states have internal predecessors, (47), 7 states have call successors, (26), 1 states have call predecessors, (26), 1 states have return successors, (26), 7 states have call predecessors, (26), 7 states have call successors, (26) [2024-09-13 10:17:31,123 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 115 transitions. [2024-09-13 10:17:31,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2024-09-13 10:17:31,124 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:31,124 INFO L216 NwaCegarLoop]: trace histogram [8, 8, 8, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:31,141 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:31,324 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:31,325 INFO L399 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:31,325 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:31,325 INFO L85 PathProgramCache]: Analyzing trace with hash 1317572175, now seen corresponding path program 1 times [2024-09-13 10:17:31,325 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:31,325 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291412727] [2024-09-13 10:17:31,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:31,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:31,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,567 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:31,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,569 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:31,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,570 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:31,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,572 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:31,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,573 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:31,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,575 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:31,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,578 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 10:17:31,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,581 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 10:17:31,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,585 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:17:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,589 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 10:17:31,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,593 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 61 [2024-09-13 10:17:31,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,597 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2024-09-13 10:17:31,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,601 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 71 [2024-09-13 10:17:31,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,605 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2024-09-13 10:17:31,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,614 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 179 trivial. 0 not checked. [2024-09-13 10:17:31,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291412727] [2024-09-13 10:17:31,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291412727] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:31,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069385753] [2024-09-13 10:17:31,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:31,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:31,615 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:31,616 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:31,618 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-09-13 10:17:31,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:31,685 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-09-13 10:17:31,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:31,948 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 172 trivial. 0 not checked. [2024-09-13 10:17:31,949 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:32,021 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 180 trivial. 0 not checked. [2024-09-13 10:17:32,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069385753] provided 1 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:32,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:17:32,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7, 6] total 13 [2024-09-13 10:17:32,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987994189] [2024-09-13 10:17:32,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:32,022 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:17:32,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:32,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:17:32,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:17:32,023 INFO L87 Difference]: Start difference. First operand 82 states and 115 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-09-13 10:17:32,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:32,077 INFO L93 Difference]: Finished difference Result 81 states and 114 transitions. [2024-09-13 10:17:32,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:17:32,078 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) Word has length 87 [2024-09-13 10:17:32,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:32,079 INFO L225 Difference]: With dead ends: 81 [2024-09-13 10:17:32,079 INFO L226 Difference]: Without dead ends: 81 [2024-09-13 10:17:32,079 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 195 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-09-13 10:17:32,079 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:32,080 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 54 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:17:32,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2024-09-13 10:17:32,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2024-09-13 10:17:32,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 47 states have internal predecessors, (52), 31 states have call successors, (31), 2 states have call predecessors, (31), 2 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2024-09-13 10:17:32,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 114 transitions. [2024-09-13 10:17:32,084 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 114 transitions. Word has length 87 [2024-09-13 10:17:32,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:32,084 INFO L474 AbstractCegarLoop]: Abstraction has 81 states and 114 transitions. [2024-09-13 10:17:32,085 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 1 states have call successors, (10), 1 states have call predecessors, (10), 1 states have return successors, (10), 1 states have call predecessors, (10), 1 states have call successors, (10) [2024-09-13 10:17:32,085 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 114 transitions. [2024-09-13 10:17:32,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2024-09-13 10:17:32,086 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:32,086 INFO L216 NwaCegarLoop]: trace histogram [9, 9, 9, 6, 6, 6, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:32,100 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:32,290 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,9 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:32,290 INFO L399 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:32,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:32,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1215787035, now seen corresponding path program 1 times [2024-09-13 10:17:32,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:32,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641704483] [2024-09-13 10:17:32,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:32,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:32,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:32,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1611041707] [2024-09-13 10:17:32,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:32,317 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:32,317 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:32,319 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:32,320 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-09-13 10:17:32,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:32,390 INFO L262 TraceCheckSpWp]: Trace formula consists of 223 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-09-13 10:17:32,392 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:32,505 INFO L134 CoverageAnalysis]: Checked inductivity of 214 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 211 trivial. 0 not checked. [2024-09-13 10:17:32,505 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:32,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:32,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641704483] [2024-09-13 10:17:32,527 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:32,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611041707] [2024-09-13 10:17:32,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611041707] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:32,527 INFO L185 FreeRefinementEngine]: Found 0 perfect and 1 imperfect interpolant sequences. [2024-09-13 10:17:32,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3] total 3 [2024-09-13 10:17:32,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448639220] [2024-09-13 10:17:32,527 INFO L85 oduleStraightlineAll]: Using 1 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:32,527 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:17:32,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:32,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:17:32,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:17:32,528 INFO L87 Difference]: Start difference. First operand 81 states and 114 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 10:17:32,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:32,612 INFO L93 Difference]: Finished difference Result 104 states and 152 transitions. [2024-09-13 10:17:32,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:17:32,613 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) Word has length 92 [2024-09-13 10:17:32,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:32,614 INFO L225 Difference]: With dead ends: 104 [2024-09-13 10:17:32,614 INFO L226 Difference]: Without dead ends: 84 [2024-09-13 10:17:32,614 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-09-13 10:17:32,614 INFO L434 NwaCegarLoop]: 46 mSDtfsCounter, 5 mSDsluCounter, 54 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:32,615 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 100 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-09-13 10:17:32,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2024-09-13 10:17:32,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 63. [2024-09-13 10:17:32,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 10:17:32,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 86 transitions. [2024-09-13 10:17:32,619 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 86 transitions. Word has length 92 [2024-09-13 10:17:32,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:32,619 INFO L474 AbstractCegarLoop]: Abstraction has 63 states and 86 transitions. [2024-09-13 10:17:32,619 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 3 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 3 states have call predecessors, (11), 3 states have call successors, (11) [2024-09-13 10:17:32,619 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 86 transitions. [2024-09-13 10:17:32,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2024-09-13 10:17:32,620 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:32,621 INFO L216 NwaCegarLoop]: trace histogram [12, 12, 12, 6, 6, 6, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:32,637 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-09-13 10:17:32,821 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-09-13 10:17:32,821 INFO L399 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:32,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:32,822 INFO L85 PathProgramCache]: Analyzing trace with hash 1052451092, now seen corresponding path program 2 times [2024-09-13 10:17:32,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:32,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809884113] [2024-09-13 10:17:32,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:32,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,665 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2024-09-13 10:17:33,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,668 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 7 [2024-09-13 10:17:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,669 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 12 [2024-09-13 10:17:33,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,670 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2024-09-13 10:17:33,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,671 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 23 [2024-09-13 10:17:33,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,674 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2024-09-13 10:17:33,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,677 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2024-09-13 10:17:33,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,681 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 43 [2024-09-13 10:17:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,686 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2024-09-13 10:17:33,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,691 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 53 [2024-09-13 10:17:33,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,696 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 65 [2024-09-13 10:17:33,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,705 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2024-09-13 10:17:33,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,713 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 75 [2024-09-13 10:17:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,722 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2024-09-13 10:17:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,731 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2024-09-13 10:17:33,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,740 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 93 [2024-09-13 10:17:33,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,751 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2024-09-13 10:17:33,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,760 INFO L381 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 103 [2024-09-13 10:17:33,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-09-13 10:17:33,771 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 10:17:33,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809884113] [2024-09-13 10:17:33,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [809884113] provided 0 perfect and 1 imperfect interpolant sequences [2024-09-13 10:17:33,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385422700] [2024-09-13 10:17:33,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:17:33,774 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:33,774 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:33,776 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:33,777 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-09-13 10:17:33,864 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:17:33,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:17:33,867 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 34 conjuncts are in the unsatisfiable core [2024-09-13 10:17:33,870 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 10:17:34,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:37,788 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 13 proven. 14 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2024-09-13 10:17:37,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385422700] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:37,789 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-09-13 10:17:37,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 9] total 22 [2024-09-13 10:17:37,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390962137] [2024-09-13 10:17:37,789 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:37,790 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-09-13 10:17:37,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:37,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-09-13 10:17:37,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=398, Unknown=0, NotChecked=0, Total=506 [2024-09-13 10:17:37,791 INFO L87 Difference]: Start difference. First operand 63 states and 86 transitions. Second operand has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 10:17:38,516 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:38,517 INFO L93 Difference]: Finished difference Result 68 states and 92 transitions. [2024-09-13 10:17:38,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-09-13 10:17:38,517 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) Word has length 110 [2024-09-13 10:17:38,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:38,518 INFO L225 Difference]: With dead ends: 68 [2024-09-13 10:17:38,518 INFO L226 Difference]: Without dead ends: 62 [2024-09-13 10:17:38,518 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=196, Invalid=734, Unknown=0, NotChecked=0, Total=930 [2024-09-13 10:17:38,518 INFO L434 NwaCegarLoop]: 69 mSDtfsCounter, 37 mSDsluCounter, 425 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 472 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:38,519 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 494 Invalid, 472 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-09-13 10:17:38,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2024-09-13 10:17:38,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2024-09-13 10:17:38,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 36 states have internal predecessors, (36), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 10:17:38,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 82 transitions. [2024-09-13 10:17:38,522 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 82 transitions. Word has length 110 [2024-09-13 10:17:38,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:38,523 INFO L474 AbstractCegarLoop]: Abstraction has 62 states and 82 transitions. [2024-09-13 10:17:38,524 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.409090909090909) internal successors, (53), 23 states have internal predecessors, (53), 9 states have call successors, (34), 1 states have call predecessors, (34), 1 states have return successors, (34), 9 states have call predecessors, (34), 9 states have call successors, (34) [2024-09-13 10:17:38,524 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 82 transitions. [2024-09-13 10:17:38,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2024-09-13 10:17:38,526 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:38,526 INFO L216 NwaCegarLoop]: trace histogram [16, 16, 16, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:38,541 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-09-13 10:17:38,729 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-09-13 10:17:38,729 INFO L399 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:38,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:38,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1894971634, now seen corresponding path program 2 times [2024-09-13 10:17:38,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:38,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150181569] [2024-09-13 10:17:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:38,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:38,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1633166803] [2024-09-13 10:17:38,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:17:38,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:38,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:38,768 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:38,769 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-09-13 10:17:38,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-09-13 10:17:38,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:17:38,855 INFO L262 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 57 conjuncts are in the unsatisfiable core [2024-09-13 10:17:38,858 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:39,752 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-13 10:17:39,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2024-09-13 10:17:40,715 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 27 proven. 21 refuted. 0 times theorem prover too weak. 540 trivial. 0 not checked. [2024-09-13 10:17:40,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150181569] [2024-09-13 10:17:40,715 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:40,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633166803] [2024-09-13 10:17:40,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633166803] provided 0 perfect and 2 imperfect interpolant sequences [2024-09-13 10:17:40,716 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-09-13 10:17:40,716 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2024-09-13 10:17:40,716 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662276181] [2024-09-13 10:17:40,716 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-09-13 10:17:40,716 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-09-13 10:17:40,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:40,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-09-13 10:17:40,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-09-13 10:17:40,717 INFO L87 Difference]: Start difference. First operand 62 states and 82 transitions. Second operand has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-09-13 10:17:41,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:41,044 INFO L93 Difference]: Finished difference Result 59 states and 79 transitions. [2024-09-13 10:17:41,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-09-13 10:17:41,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) Word has length 134 [2024-09-13 10:17:41,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:41,045 INFO L225 Difference]: With dead ends: 59 [2024-09-13 10:17:41,045 INFO L226 Difference]: Without dead ends: 59 [2024-09-13 10:17:41,046 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 271 GetRequests, 247 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=435, Unknown=0, NotChecked=0, Total=552 [2024-09-13 10:17:41,046 INFO L434 NwaCegarLoop]: 61 mSDtfsCounter, 33 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 309 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:41,046 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 350 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 309 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-09-13 10:17:41,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2024-09-13 10:17:41,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2024-09-13 10:17:41,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 33 states have (on average 1.0) internal successors, (33), 33 states have internal predecessors, (33), 23 states have call successors, (23), 2 states have call predecessors, (23), 2 states have return successors, (23), 23 states have call predecessors, (23), 23 states have call successors, (23) [2024-09-13 10:17:41,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 79 transitions. [2024-09-13 10:17:41,051 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 79 transitions. Word has length 134 [2024-09-13 10:17:41,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:41,051 INFO L474 AbstractCegarLoop]: Abstraction has 59 states and 79 transitions. [2024-09-13 10:17:41,051 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 19 states have internal predecessors, (51), 10 states have call successors, (40), 1 states have call predecessors, (40), 1 states have return successors, (40), 10 states have call predecessors, (40), 10 states have call successors, (40) [2024-09-13 10:17:41,052 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 79 transitions. [2024-09-13 10:17:41,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2024-09-13 10:17:41,055 INFO L208 NwaCegarLoop]: Found error trace [2024-09-13 10:17:41,055 INFO L216 NwaCegarLoop]: trace histogram [17, 17, 17, 6, 6, 6, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:41,070 INFO L540 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-09-13 10:17:41,259 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-09-13 10:17:41,260 INFO L399 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (and 8 more)] === [2024-09-13 10:17:41,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-09-13 10:17:41,260 INFO L85 PathProgramCache]: Analyzing trace with hash -85051925, now seen corresponding path program 2 times [2024-09-13 10:17:41,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-09-13 10:17:41,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821987718] [2024-09-13 10:17:41,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-09-13 10:17:41,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-09-13 10:17:41,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unknown [2024-09-13 10:17:41,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [126857353] [2024-09-13 10:17:41,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-09-13 10:17:41,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-09-13 10:17:41,286 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/certificate-witnesses-artifact/automizer/z3 [2024-09-13 10:17:41,288 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-09-13 10:17:41,289 INFO L327 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-09-13 10:17:41,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-09-13 10:17:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2024-09-13 10:17:41,342 INFO L262 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 3 conjuncts are in the unsatisfiable core [2024-09-13 10:17:41,345 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2024-09-13 10:17:41,622 INFO L134 CoverageAnalysis]: Checked inductivity of 656 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 652 trivial. 0 not checked. [2024-09-13 10:17:41,622 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-09-13 10:17:41,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-09-13 10:17:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821987718] [2024-09-13 10:17:41,623 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: SMT_SOLVER_CANNOT_INTERPOLATE_INPUT [2024-09-13 10:17:41,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126857353] [2024-09-13 10:17:41,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126857353] provided 1 perfect and 0 imperfect interpolant sequences [2024-09-13 10:17:41,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-09-13 10:17:41,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-09-13 10:17:41,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201904321] [2024-09-13 10:17:41,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-09-13 10:17:41,623 INFO L551 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-09-13 10:17:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-09-13 10:17:41,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-09-13 10:17:41,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:17:41,624 INFO L87 Difference]: Start difference. First operand 59 states and 79 transitions. Second operand has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 10:17:41,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-09-13 10:17:41,670 INFO L93 Difference]: Finished difference Result 58 states and 78 transitions. [2024-09-13 10:17:41,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-09-13 10:17:41,671 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) Word has length 142 [2024-09-13 10:17:41,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-09-13 10:17:41,671 INFO L225 Difference]: With dead ends: 58 [2024-09-13 10:17:41,671 INFO L226 Difference]: Without dead ends: 0 [2024-09-13 10:17:41,672 INFO L433 NwaCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 139 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-09-13 10:17:41,672 INFO L434 NwaCegarLoop]: 32 mSDtfsCounter, 5 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-09-13 10:17:41,672 INFO L435 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 78 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-09-13 10:17:41,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2024-09-13 10:17:41,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2024-09-13 10:17:41,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-09-13 10:17:41,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2024-09-13 10:17:41,673 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 142 [2024-09-13 10:17:41,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-09-13 10:17:41,673 INFO L474 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2024-09-13 10:17:41,673 INFO L475 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 7.0) internal successors, (21), 4 states have internal predecessors, (21), 2 states have call successors, (11), 1 states have call predecessors, (11), 1 states have return successors, (11), 2 states have call predecessors, (11), 2 states have call successors, (11) [2024-09-13 10:17:41,673 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2024-09-13 10:17:41,673 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2024-09-13 10:17:41,675 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT (10 of 11 remaining) [2024-09-13 10:17:41,675 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT (9 of 11 remaining) [2024-09-13 10:17:41,675 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONPRE_CONDITION (8 of 11 remaining) [2024-09-13 10:17:41,675 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONPRE_CONDITION (7 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONPRE_CONDITION (6 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONPRE_CONDITION (5 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONPRE_CONDITION (4 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONPRE_CONDITION (3 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location assume_abort_if_notErr0ENSURES_VIOLATIONPOST_CONDITION (2 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (1 of 11 remaining) [2024-09-13 10:17:41,676 INFO L785 garLoopResultBuilder]: Registering result SAFE for location __VERIFIER_assertErr1ENSURES_VIOLATIONPOST_CONDITION (0 of 11 remaining) [2024-09-13 10:17:41,688 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-09-13 10:17:41,876 WARN L456 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/certificate-witnesses-artifact/automizer/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-09-13 10:17:41,879 INFO L408 BasicCegarLoop]: Path program histogram: [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-09-13 10:17:41,881 INFO L165 ceAbstractionStarter]: Computing trace abstraction results [2024-09-13 10:17:41,883 INFO L469 ceAbstractionStarter]: Automizer considered 2 witness invariants [2024-09-13 10:17:41,883 INFO L470 ceAbstractionStarter]: WitnessConsidered=2 [2024-09-13 10:17:41,883 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.09 10:17:41 BoogieIcfgContainer [2024-09-13 10:17:41,883 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2024-09-13 10:17:41,884 INFO L158 Benchmark]: Toolchain (without parser) took 30856.87ms. Allocated memory was 159.4MB in the beginning and 427.8MB in the end (delta: 268.4MB). Free memory was 100.9MB in the beginning and 219.9MB in the end (delta: -119.0MB). Peak memory consumption was 151.6MB. Max. memory is 16.1GB. [2024-09-13 10:17:41,884 INFO L158 Benchmark]: Witness Parser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 118.4MB. There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:17:41,884 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory was 116.3MB in the beginning and 116.1MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:17:41,885 INFO L158 Benchmark]: CACSL2BoogieTranslator took 356.63ms. Allocated memory is still 159.4MB. Free memory was 100.5MB in the beginning and 84.9MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2024-09-13 10:17:41,885 INFO L158 Benchmark]: Boogie Procedure Inliner took 49.98ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 82.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2024-09-13 10:17:41,885 INFO L158 Benchmark]: Boogie Preprocessor took 49.84ms. Allocated memory is still 159.4MB. Free memory was 82.8MB in the beginning and 81.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2024-09-13 10:17:41,885 INFO L158 Benchmark]: RCFGBuilder took 553.19ms. Allocated memory was 159.4MB in the beginning and 203.4MB in the end (delta: 44.0MB). Free memory was 80.7MB in the beginning and 168.3MB in the end (delta: -87.7MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. [2024-09-13 10:17:41,886 INFO L158 Benchmark]: TraceAbstraction took 29841.77ms. Allocated memory was 203.4MB in the beginning and 427.8MB in the end (delta: 224.4MB). Free memory was 168.3MB in the beginning and 219.9MB in the end (delta: -51.6MB). Peak memory consumption was 172.8MB. Max. memory is 16.1GB. [2024-09-13 10:17:41,887 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Witness Parser took 0.18ms. Allocated memory is still 159.4MB. Free memory is still 118.4MB. There was no memory consumed. Max. memory is 16.1GB. * CDTParser took 0.18ms. Allocated memory is still 159.4MB. Free memory was 116.3MB in the beginning and 116.1MB in the end (delta: 167.8kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 356.63ms. Allocated memory is still 159.4MB. Free memory was 100.5MB in the beginning and 84.9MB in the end (delta: 15.6MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 49.98ms. Allocated memory is still 159.4MB. Free memory was 84.9MB in the beginning and 82.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 49.84ms. Allocated memory is still 159.4MB. Free memory was 82.8MB in the beginning and 81.1MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 553.19ms. Allocated memory was 159.4MB in the beginning and 203.4MB in the end (delta: 44.0MB). Free memory was 80.7MB in the beginning and 168.3MB in the end (delta: -87.7MB). Peak memory consumption was 24.9MB. Max. memory is 16.1GB. * TraceAbstraction took 29841.77ms. Allocated memory was 203.4MB in the beginning and 427.8MB in the end (delta: 224.4MB). Free memory was 168.3MB in the beginning and 219.9MB in the end (delta: -51.6MB). Peak memory consumption was 172.8MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 41]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 47]: invariant of correctness witness holds For all program executions holds that invariant of correctness witness holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 10]: procedure precondition always holds For all program executions holds that procedure precondition always holds at this location - PositiveResult [Line: 7]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - PositiveResult [Line: 13]: a call to reach_error is unreachable For all program executions holds that a call to reach_error is unreachable at this location - PositiveResult [Line: 10]: procedure postcondition always holds For all program executions holds that procedure postcondition always holds at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 44 locations, 11 error locations. Started 1 CEGAR loops. OverallTime: 29.8s, OverallIterations: 17, TraceHistogramMax: 17, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 5.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 414 SdHoareTripleChecker+Valid, 3.0s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 333 mSDsluCounter, 2957 SdHoareTripleChecker+Invalid, 2.7s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2165 mSDsCounter, 302 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 2431 IncrementalHoareTripleChecker+Invalid, 2733 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 302 mSolverCounterUnsat, 792 mSDtfsCounter, 2431 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 2084 GetRequests, 1890 SyntacticMatches, 5 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 5.6s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=173occurred in iteration=10, InterpolantAutomatonStates: 138, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 17 MinimizatonAttempts, 129 StatesRemovedByMinimization, 9 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.6s SatisfiabilityAnalysisTime, 20.5s InterpolantComputationTime, 2207 NumberOfCodeBlocks, 2080 NumberOfCodeBlocksAsserted, 32 NumberOfCheckSat, 2319 ConstructedInterpolants, 4 QuantifiedInterpolants, 21016 SizeOfPredicates, 47 NumberOfNonLiveVariables, 2312 ConjunctsInSsa, 337 ConjunctsInUnsatCore, 32 InterpolantComputations, 9 PerfectInterpolantSequences, 5592/5880 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 11 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2024-09-13 10:17:41,916 INFO L552 MonitoredProcess]: [MP /storage/repos/certificate-witnesses-artifact/automizer/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request...